package com.zhang.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;

@Configuration
public class CorsConfig {

    //设置跨域请求最大有效时长，这里默认1天
    private static final long MAX_AGE = 24 * 60 * 60;

    private CorsConfiguration buildConfig(){
        CorsConfiguration corsConfiguration = new CorsConfiguration();
        //1,设置访问原地址
        corsConfiguration.addAllowedOrigin("*");
        //2,设置访问源请求头
        corsConfiguration.addAllowedHeader("*");
        //3,设置访问源请求方法
        corsConfiguration.addAllowedMethod("*");
        corsConfiguration.setMaxAge(MAX_AGE);
        return corsConfiguration;
    }

    @Bean
    public CorsFilter corsFilter(){
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        //4,对接口配置配置跨域配置
        source.registerCorsConfiguration("/**", buildConfig());
        return new CorsFilter(source);
    }
}